/*
	QMPlay2 is a video and audio player.
	Copyright (C) 2010-2017  Błażej Szczygieł

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <ScreenSaver.hpp>

#include <QCoreApplication>

#include <windows.h>

static inline bool inhibitScreenSaver(MSG *msg, const bool inhibited)
{
	return (inhibited && msg->message == WM_SYSCOMMAND && ((msg->wParam & 0xFFF0) == SC_SCREENSAVE || (msg->wParam & 0xFFF0) == SC_MONITORPOWER));
}

#include <QAbstractNativeEventFilter>

class ScreenSaverPriv : public QAbstractNativeEventFilter
{
public:
	bool inhibited = false;

private:
	bool nativeEventFilter(const QByteArray &, void *m, long *) override
	{
		return inhibitScreenSaver((MSG *)m, inhibited);
	}
};

/**/

ScreenSaver::ScreenSaver() :
	m_priv(new ScreenSaverPriv)
{
	qApp->installNativeEventFilter(m_priv);
}
ScreenSaver::~ScreenSaver()
{
	delete m_priv;
}

void ScreenSaver::inhibit(int context)
{
	if (inhibitHelper(context))
		m_priv->inhibited = true;
}
void ScreenSaver::unInhibit(int context)
{
	if (unInhibitHelper(context))
		m_priv->inhibited = false;
}
